Keeping your urban planter boxes thriving requires knowing when your plants are hungry for nutrients. While plants in containers have limited soil resources, over-fertilizing can be just as harmful as under-fertilizing. Here are the key signs that indicate it's time to feed your plants.
The most common signal is slow or stunted growth. If your plants seem to have stopped growing during their active season, they may lack essential nutrients. Another clear indicator is leaf discoloration. Look for leaves turning pale green, yellow, or developing unusual patterns, which often signals a nitrogen or other nutrient deficiency.
Pay attention to flowering and fruiting as well. A lack of blossoms or poorly developed fruits can point to a need for phosphorus-rich fertilizer. Weak stems or leaves that appear smaller than usual are also red flags. Before applying any fertilizer, always rule out other issues like improper watering, pests, or insufficient sunlight, as these can cause similar symptoms.
A good practice is to use a balanced, slow-release fertilizer at the beginning of the growing season and supplement based on your plants' performance. Remember, healthy plants in quality potting mix may not need frequent feeding. Observe your plants regularly, and they will tell you what they need.